*{
    margin: 0;
    padding: 0;
}
.clearfix:before,
.clearfix:after{
    display: block;
    content: "";
    clear: both;
}

.div{
    width: 1000px;
    margin: auto;
}

.nn{
    border-bottom: 1px solid #333333;
    margin-bottom: 20px;
}

#input{
    border: none;
    font-size: 22px;
    float: left;
    width: 90%;
    line-height: 50px;
    outline: none;
    padding-left: 20px;
}
#button{
    border: none;
    font-size: 22px;
    background: #fff;
    float: right;
    line-height: 50px;
    outline: none;
    cursor: pointer;
}

#ul{

    font-size: 22px;
}
#ul li{
    padding-left: 20px;
    line-height: 50px;
    border-bottom: 1px solid #cccccc;
    list-style: none;
    margin-bottom: 10px;
}
.span1{
    border: 1px solid red;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: inline-block;
    line-height: 50px;
    margin-right: 20px;
}
#ul li button{
    float: right;
    width: 80px;
    height: 40px;
    border: none;
    background: #dcd2d2;
    font-family: 楷体;
    outline: none;
    cursor: pointer;
    margin-left: 10px;
}
.span2{
    font-family: 楷体;
}
.wn1{
    text-decoration:line-through;
}